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可变气门技术主要为了省油,雅玛哈(VCT),杜卡迪的发动机很早就有的技术.
在运动的趣味性与运输的效率性上,大部分摩托车选择前者。
Yamaha’s new F115A is a versatile model. Compact dimensions, lighter weight and Yamaha’s counter-rotating propeller option make it popular for twin-engine installations, while it’s also an extremely good fit for medium-sized, single engine fishing and family-oriented boats.
The new Yamaha F200C replaces Yamaha’s current model, the popular and ultra-reliable F200A.
At the engine’s heart is a 3.3-litre DOHC 200hp V6 with Yamaha’s industry leading variable cam timing (VCT) offering dramatically improved low and mid-range engine torque.
VCT advances and retards the camshaft timing according to engine RPM, engine load and several other factors. VCT improves intake and exhaust efficiency at low and mid-range RPM without compromising maximum horsepower output or performance at the top of the rev range.
Like the F115A, the new F200C has a single throttle valve controlled electronically by the engine’s ECM. Intake air is precisely managed and smoothly directed through surge chambers to the combustion chambers via long intake manifolds. The new manifold design increases airflow and is optimised to work with VCT in boosting low and mid-range torque.
Both Yamaha’s F115A and F200C are rated as ultra-low emission engines, exceeding all European and US emissions guidelines.
In New Zealand Yamaha F115A and F200C outboards will debut on the Yamaha Motor New Zealand stand at the Auckland International Boat Show, Viaduct Harbour, September 15-18. |
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